TL;DR: I messed up a LUKS partition resize operation and need help restoring it. Below is all relevant information I could think of. If you think any other information might be relevant, or if anything is unclear, let me know.

The problem

Can't mount my LUKS encrypted partition due to (at least) that its' physical size is different from its' filesystem size, after a failed attempt at shrinking the partition according to this guide

The solution

I think the (at least partial) solution is ensure the filesystem and LV sizes are equal, and that the PV size is greater than both.

Presumption of no data loss

Please correct me if I'm wrong. Between 0 and ~62.14GB of data has been lost, due to the LVM being ~62.14GB smaller than the filesystem. If I'm very lucky, none of the reduced-away blocks contained data, if I'm very unlucky then all of them did.

The Question and sub questions

Could someone please help me understand the correct and safe way to regain access to the contents of my LUKS-encrypted partition? I wan't to understand what I'm doing and be confident I won't mess anything up any further before I do anything else.

First of all, I'm not sure if I can use the steps of the guide at all with my current starting point, as it probably expects a functional LUKS partition to begin with. These are sizes of different devices.

here it says the filesystem and logical volume must have the same size, and common sense tells me the physical volume must be of greater or equal size. Here none of these are the case, so I need to either decrease the Filesystem to equal LV (842.62GB) or increase the LV to 904.75331584 GB and increase PV to somewhere above this.

Still disks is claiming the LUKS is 999GB. Why?

Is it better to just decrease Filesystem or to increase both PV and LV?

If the latter, does order matter?

How come disks/pvdisplay and e2fsck disagree on the size of the PV and filesystem? (241858560/220887040 != 904.75331584/900.00)